collapseos/tools/upload.py
Virgil Dupras 9c7f006d47 tools/upload: make I/O a bit slower
Without delays between read/writes, I often add lockups.
2019-05-07 14:49:34 -04:00

66 lines
2.0 KiB
Python
Executable File

#!/usr/bin/python
# Push specified file (max 0xff bytes) to specified device and verify that
# the contents is correct by sending a "peek" command afterwards and check
# the output. Errors out if the contents isn't the same. The parameter
# passed to the "peek" command is the length of the uploaded file.
import argparse
import os
import sys
import time
def sendcmd(fd, cmd):
# The serial link echoes back all typed characters and expects us to read
# them. We have to send each char one at a time.
print("Executing {}".format(cmd.decode()))
for c in cmd:
os.write(fd, bytes([c]))
os.read(fd, 1)
os.write(fd, b'\n')
os.read(fd, 2) # sends back \r\n
def main():
parser = argparse.ArgumentParser()
parser.add_argument('device')
parser.add_argument('filename')
args = parser.parse_args()
st = os.stat(args.filename)
if st.st_size > 0xff:
print("File too big. 0xff bytes max")
return 1
fd = os.open(args.device, os.O_RDWR)
sendcmd(fd, 'load {:x}'.format(st.st_size).encode())
print("Loading...")
with open(args.filename, 'rb') as fp:
fcontents = fp.read()
for c in fcontents:
os.write(fd, bytes([c]))
# Let's give the machine a bit of time to breathe. We ain't in a
# hurry now, are we?
time.sleep(0.0001)
print("Loaded")
os.read(fd, 5)
print("Peeking back...")
sendcmd(fd, 'peek {:x}'.format(st.st_size).encode())
peek = b''
while len(peek) < st.st_size * 2:
peek += os.read(fd, 1)
time.sleep(0.0001)
os.close(fd)
print("Got {}".format(peek.decode()))
print("Comparing...")
for i, c in enumerate(fcontents):
hexfmt = '{:02X}'.format(c).encode()
if hexfmt != peek[:2]:
print("Mismatch at byte {}! {} != {}".format(i, peek[:2], hexfmt))
return 1
peek = peek[2:]
print("All good!")
return 0
if __name__ == '__main__':
sys.exit(main())